What component do copper compression joints utilize?

Copper compression joints utilize a beveled ring as a key component in their design. The beveled ring is crucial for creating a secure and leak-free connection between two pieces of copper tubing. When the joint is assembled, the compression nut tightens against the beveled ring. This action compresses the ring against the surface of the tubing, forming a tight seal that can withstand pressure. This type of connection is beneficial because it does not require the use of flame or solder, allowing for easier and quicker installation in various plumbing applications.

The other options, while related to plumbing connections, do not provide the same functionality as a beveled ring. A rubber gasket might seal, but it is often used in other kinds of joint types. A threaded adapter typically involves a different connection method, and a soldered joint requires melting a filler metal. Each of these has its own application but does not constitute the core mechanism of a copper compression joint.